Find differences between two Lists with Dart | Flutter

main.dart

///
/// Find differences between two Lists with Dart | Flutter
///
/// DartPad: https://dartpad.dev/3b4d345e76d8c7dd3f0f571bdefcdfdb
///

void main() {
  List<double> _current = [1, 2, 3, 4, 7]; // [1,2,3,4,    7]
  List<double> _new = [3, 5, 6, 7, 9, 10]; // [    3,  5,6,7,9,10]

  List<double> output1 =
      _current.where((element) => !_new.contains(element)).toList();
  print(output1
      .toString()); // [1, 2, 4] Existed in `_current` but are not in `_new`.

  List<double> output2 =
      _new.where((element) => !_current.contains(element)).toList();
  print(output2
      .toString()); // [5, 6, 9, 10] Were not in `_current` and are indeed `_new`.
}

///
/// Thanks to the Answer and Question on Stack Overflow:
/// [A: Karim Elghamry](https://stackoverflow.com/a/57633481/638153)
/// [Q: Sheshank S.](https://stackoverflow.com/questions/57633439/get-difference-of-lists-flutter-dart)
///